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Automatic Regional Weather Forecast in Hong Kong & Pearl River Delta Region

Local Weather Forecast | Regional Temperature Forecast in HK
9-day Weather Forecast | UV Index Forecast
Weather Information for South China Coastal Waters

Bulletin issued at 18:33 HKT 20/Oct/2016

At 6 p.m. at the Hong Kong Observatory the air temperature was 28 degrees Celsius and the relative humidity 77 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.1. The intensity of UV radiation was low.

Please be reminded that:

The Tropical Cyclone Signal No. 1 has been issued.

The air temperatures at other places were:

King's Park 29 degrees;
Wong Chuk Hang 28 degrees;
Ta Kwu Ling 29 degrees;
Lau Fau Shan 28 degrees;
Tai Po 29 degrees;
Sha Tin 29 degrees;
Tuen Mun 28 degrees;
Tseung Kwan O 27 degrees;
Sai Kung 29 degrees;
Cheung Chau 27 degrees;
Chek Lap Kok 29 degrees;
Tsing Yi 29 degrees;
Shek Kong 29 degrees;
Tsuen Wan Ho Koon 27 degrees;
Tsuen Wan Shing Mun Valley 28 degrees;
Hong Kong Park 29 degrees;
Shau Kei Wan 28 degrees;
Kowloon City 29 degrees;
Happy Valley 29 degrees;
Wong Tai Sin 29 degrees;
Stanley 27 degrees;
Kwun Tong 29 degrees;
Sham Shui Po 29 degrees;
Kai Tak Runway Park 30 degrees;
Yuen Long Park 29 degrees.

Here is the information on Severe Typhoon Haima:
Location: 19.5 degrees north, 118.1 degrees east; Maximum sustained wind near its centre: 155 km/h.


Note: The data above is provisional. Only limited data validation has been carried out.


Climatological Information for 20 Oct

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Local Weather Forecast

Automatic Regional Weather Forecast in Hong Kong & Pearl River Delta Region

Current Weather | Regional Temperature Forecast in HK |  9-day Weather Forecast
UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 17:45 HKT 20/Oct/2016

Here is the latest weather bulletin issued by the Hong Kong Observatory.

Weather forecast for tonight and tomorrow

Mainly cloudy. Moderate north to northwesterly winds. Winds will strengthen gradually with a few showers overnight. Frequent squalls and heavy rain tomorrow. Seas will be rough with swells. Winds will reach gale force offshore, becoming west to southwesterlies later. Temperatures will range between 24 and 27 degrees tomorrow.

Outlook : Rain will ease off later on Saturday. Weather will improve early next week.


(The above forecast period is valid up to 23:59 HKT tomorrow, 21/10/2016; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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MARINE FORECAST
Traditional Chinese Simplified Chinese

Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 09:00 HKT 20/Oct/2016

HURRICANE WARNING AREAS: KWANGTUNG, PRATAS, BALINTANG AND SCARBOROUGH.
STORM WARNING AREA: BASHI.
GALE WARNING AREAS: TAIWAN STRAIT AND PARACEL.

GENERAL SITUATION AT 192100 UTC:
FOR DETAILS ON SEVERE TYPHOON HAIMA (1622), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 200100 UTC:

HONG KONG= N TO NE 4-5, 6 LATER. A FEW SHOWERS LATER. SEA 2-3 M. SWELL E 2 M. TEMP 31-23 C. =
KWANGTUNG= N TO NE 6-7, CYCLONIC 12 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS LATER. SEA 3-4 M, UP TO 14 M LATER. SWELL E TO NE 5-7 M LATER. =
TAIWAN STRAIT= NE 6-7, SE 8-9 LATER. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS LATER. SEA 3-4 M, 6-8 M LATER. SWELL SE 2-3 M LATER. =
BASHI= E TO NE 10-11, SE 8-9 LATER. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA 10-12 M, 6-8 M LATER. SWELL E TO NE 3-5 M. =
PRATAS= N TO NW 8-9, CYCLONIC 12 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS LATER. SEA 6-8 M, UP TO 14 M LATER. SWELL E TO NE 4-6 M, UP TO 7 M LATER. =
BALINTANG= CYCLONIC 12, SE 8-9 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 14 M, 6-8 M LATER. SWELL SE 5-7. =
SCARBOROUGH= W TO SW 12, S 8-9 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 14 M, 6-8 M LATER. SWELL SE 5-7 M. =
PARACEL= NE 6-7, N TO NW 8-9 LATER. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS LATER. SEA 3-4 M, 6-8 M LATER. SWELL E TO NE 3-5 M LATER. =
TONKIN= W TO NW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= N TO NW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
NNNN
Abbreviations:
KT, VRB, SLW, FRQ - knot, variable, slow, frequent STNR, QSTNR, C - stationary, quasi-stationary, degrees celsius WKN, INTSF, INTST, NC - weaken, intensify, intensity, no change LGT, ISOL, SCT, OCNL - light, isolated, scattered, occasional CLD, DZ, TS - cloudy, drizzle, thunderstorm

The date and time are specified by a 6-digit number DDHHMM. DD stands for the day of month, HH represents the hour while MM indicates the minute in UTC.


  • Map showing the 10 forecast areas
  • Tidal Information

    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

    Current Weather | Local Weather Forecast | Regional Temperature Forecast in HK
    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 16:30 HKT 20/Oct/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 4:30 p.m. on 20 October 2016

    Warnings:
    Hurricane force winds in Hong Kong adjacent waters, Nan'ao, Shanwei and south of Hong Kong. Gale force winds in Shangchuan Dao.

    Weather Situation:
    At 4 p.m., Severe Typhoon Haima with maximum sustained winds of about 165 kilometres per hour near its centre was located at 19.1 degrees north, 118.5 degrees east. It is forecast to move northwest at about 25 kilometres per hour across the northern part of the South China Sea.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North to northwest force 5 to 6, force 11 to 12 later.
    A few squally showers and thunderstorms later.
    Moderate to rough seas, becoming phenomenal.

    Nan'ao:
    Northeast force 8 to 9, becoming east to southeast up to force 12 later.
    Frequent heavy squally showers and thunderstorms.
    Very rough to high seas, becoming phenomenal.

    Shanwei:
    North to northeast force 7 to 8, becoming cyclonic force 12 later.
    Frequent heavy squally showers and thunderstorms.
    Rough to very rough seas, becoming phenomenal seas.

    South of Hong Kong:
    North to northwest force 6 to 7, becoming west to southwest force 11 to 12 later.
    Frequent heavy squally showers and thunderstorms.
    Rough seas, becoming phenomenal.

    Shangchuan Dao:
    North to northwest force 5 to 6, becoming west to southwest force 8 to 9 later.
    Scattered heavy squally showers and thunderstorms.
    Moderate to rough seas, becoming very rough to high.

    Outlook for the next 48 hours
    South to southwesterly winds of force 5 to 6, up to force 12 in east at first. Squally showers and thunderstorms in east at first.

    Latest reports from south China coastal weather stations
    --------------------------------------------------------

    Waglan Island Wind southwest force 2
      Visibility 8 Kilometres

    Shantou Wind east-northeast force 2
      Visibility 30 Kilometres

    Dongsha Wind north force 5
      Visibility 10 Kilometres

    Huangmaozhou Wind northwest force 3

    Macau Wind north-northeast force 1
      Visibility 6 Kilometres

    Xisha Wind north-northwest force 3
      Visibility 22 Kilometres

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
  • Descriptive Terms of Wind Speeds
  • Visibility Readings in Hong Kong Waters
  • Map showing forecast areas
  • Tidal Information

    • WEATHER FORECAST FOR LOCAL AVIATION
    Traditional Chinese Simplified Chinese

    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 20/OCT/2016
    (Next update at 01:30 HKT 21/OCT/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     SEV TURB AND SEV GUSTS.  GALE FORCE WINDS. ISOL
     CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AT 5 P.M., SEVERE TYPHOON HAIMA WAS CENTRED NEAR
     19.3 DEGREES NORTH, 118.2 DEGREES EAST.  IT IS
     FORECAST TO MOVE NORTHWEST AT ABOUT 14 KNOTS
     ACROSS THE NORTHERN PART OF SOUTH CHINA SEA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  340/10-15
                  BECMG 360/25-30
                  TEMPO VRB/25G35 IN TS
       OFFSHORE:  340/20-25
                  BECMG 360/30-40G50                   29-24
   B.   2000 FT:  340/20-25
                  BECMG 360/30-40G50                   19
   C.   5000 FT:  360/20-25
                  050/50 LATER                         18
   D.  10000 FT:  080/30
                  060/50 LATER                         13
   E.  18000 FT:  080/30-35
                  050/50 LATER                         MS2
   F.  24000 FT:  070/25
                  050/50 LATER                         MS13
   G.  30000 FT:  080/25
                  050/40 LATER                         MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY. OVERCAST WITH FREQUENT SQUALLY
      HEAVY RAIN AND A FEW ISOLATED THUNDERSTORMS
      LATER.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 3000 FT, 
      TEMPO FEW CB 800 FT SCT 1500 FT BKN 4000 FT
   K. VISIBILITY    : 7 KM. TEMPO 2000 M IN RAIN. 
                      TEMPO 1500 M IN TS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 11600 FT
   M. TURBULENCE    : SEV.
   N. SEA STATE     : 3.0-5.0 M     SEA TEMPERATURE    : 26 DEG
IV.  FURTHER OUTLOOK: 
     STRONG TO GALE FORCE NORTHWESTERLY WINDS.
     OVERCAST WITH FREQUENT SQUALLS AND HEAVY RAIN.=

    ===================================================================
Note: The forecast could be updated before the next issue time 
whenever there is newly expected occurrence or non-occurrence 
of significant weather as described below which may be hazardous 
to aircraft within 100-km radius of Hong Kong:

(a) Change of the tropical cyclone category
(b) Strong, Gale, Storm, and Hurricane force winds
(c) Thunderstorm/CBs
(d) Severe gusts
(e) Severe turbulence
(f) Significant low stratus
(g) Fog or thick haze/sandstorm/duststorm 
    causing significant reduction of visibility
(h) Volcanic ash
(i) Radioactive cloud
===================================================================
    Aviation Weather Observation and Forecast Information for Hong Kong International Airport
    To know more about clouds, please see Commonly observed clouds in Hong Kong.

    sigmet
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    Significant Weather Information (SIGMET)

    The Airport Meteorological Office is responsible for monitoring hazardous weather and phenomena in the atmosphere that may affect the safety of aircraft operations within a designated airspace over the northern part of the South China Sea. Weather forecasters at the Airport Meteorological Office issues SIGMET information when hazardous weather and phenomena in the atmosphere such as thunderstorms, tropical cyclones, turbulence, icing occur or are expected to occur in the airspace.

    The latest significant weather information
    issued by the Hong Kong Observatory at 17:13 HKT on 20 Oct 16

    VHHK SIGMET 4 VALID 200915/201315 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N1642 E11400 - N1748 E11300 - N2106 E11300 - N2330 E11730 - N2100 E11730 TOP FL480 MOV NW 10KT NC= VHHK SIGMET 3 VALID 201600/202200 VHHH- VHHK HONG KONG FIR TC HAIMA FCST AT 1600Z N2018 E11654 CB TOP FL480 WI 240NM OF CENTRE MOV NW 12KT NC FCST 2200Z TC CENTRE N2112 E11600=

    Please click here for more about the SIGMET

    TROPICAL CYCLONE WARNING Skip to main content
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    Tropical Cyclone Warnings

    Bulletin issued at 17:45 HKT 20/Oct/2016

    Tropical Cyclone Bulletin

    Here is the latest Tropical Cyclone Bulletin issued by the Hong Kong Observatory.

    The Standby Signal, No. 1 is in force.

    This means that a tropical cyclone now centred within about 800 kilometres of Hong Kong may affect us.

    At 6 p.m., Severe Typhoon Haima was estimated to be about 510 kilometres southeast of Hong Kong (near 19.5 degrees north 118.1 degrees east) and is forecast to move northwest at about 25 kilometres per hour across the northern part of the South China Sea.
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    TROPICAL CYCLONE WARNING FOR SHIPPING
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    Tropical Cyclone Warning for Shipping

    Tropical Cyclone Warning |  Track and Positions of Tropical Cyclones
    Current Weather |  Local Weather Forecast |  9-day Weather Forecast
    South China Coastal Waters |  Marine Forecast
    Severe Weather Information Centre

    Bulletin issued at 18:30 HKT 20/Oct/2016


    Tropical Cyclone Warning

    At 200900 UTC, Severe Typhoon Haima (1622) with central pressure 950 hectopascals was centred within 30 nautical miles of one nine point three degrees north (19.3 N) one one eight point three degrees east (118.3 E) and is forecast to move northwest at about 14 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 85 knots.

    Radius of over 33 knot winds 180 nautical miles over eastern semicircle, 150 nautical miles elsewhere.
    Radius of over 47 knot winds 100 nautical miles.
    Radius of over 63 knot winds 45 nautical miles.
    Radius of over 2 metre waves 300 nautical miles over eastern semicircle, 240 nautical miles elsewhere.

    Forecast position and intensity at 210900 UTC
    Two three point two degrees north (23.2 N)
    One one four point seven degrees east (114.7 E)
    Maximum winds 70 knots.

    Forecast position and intensity at 220900 UTC
    Two eight point four degrees north (28.4 N)
    One one seven point eight degrees east (117.8 E)
    Maximum winds 35 knots.

    Forecast position and intensity at 230900 UTC
    Dissipated over sea.



    The Hong Kong Observatory's tropical cyclone warnings for shipping are issued about one and a half hours after the time of observation. They incorporate additional information derived from surface and upper-air data and may therefore be slightly different from the real-time satellite or radar-based positions given in the hourly bulletins for public.

    While the forecast positions and track indicate the most likely future path of the tropical cyclone, they may deviate from the actual path taken by the storm.

    Tropical Cyclone Track
    YESTERDAY'S WEATHER AND RADIATION LEVEL Skip to main content
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    Yesterday's Weather and Radiation Level

    Bulletin issued at 00:15 HKT 20/Oct/2016 
    HKO Readings & Radiation Level

Yesterday's Weather and Radiation Level:
------------------------------------------------------

Hong Kong Observatory
Maximum Air Temperature                     25.9 C
Minimum Air Temperature                     24.4 C
Grass Minimum Temperature                   24.0 C
Relative Humidity                        92 - 99 Percent
Rainfall                                   223.4 mm 
Total rainfall since 1st January          2814.0 mm
Against an average of                     2310.5 mm

Other Stations                Min                  Max
King's Park                  24.0 C               25.9 C
Wong Chuk Hang               24.1 C               26.3 C
Ta Kwu Ling                  24.1 C               26.4 C
Lau Fau Shan                 23.7 C               26.6 C
Tai Po                       24.0 C               26.3 C
Sha Tin                      24.6 C               26.8 C
Tuen Mun                     24.5 C               26.4 C
Tseung Kwan O                24.1 C               26.1 C
Sai Kung                     24.3 C               26.5 C
Cheung Chau                  24.1 C               26.2 C
Chek Lap Kok                 24.9 C               28.8 C
Tsing Yi                     24.8 C               27.0 C
Shek Kong                    24.6 C               27.2 C
Tsuen Wan Ho Koon            23.5 C               25.1 C
Tsuen Wan Shing Mun Valley   24.0 C               26.5 C
Hong Kong Park               24.4 C               26.5 C
Shau Kei Wan                 24.1 C               26.4 C
Kowloon City                 24.0 C               26.0 C
Happy Valley                 24.8 C               27.2 C
Wong Tai Sin                 24.2 C               26.4 C
Stanley                      24.4 C               26.5 C
Kwun Tong                    24.4 C               26.3 C
Sham Shui Po                 24.5 C               27.0 C
Kai Tak Runway Park          24.8 C               27.1 C
Yuen Long Park               24.3 C               27.6 C

Duration of sunshine (King's Park):              0.1 H
The mean UV index recorded at King's Park yesterday was 0.6,
the UV intensity was Low.
The maximum UV index for yesterday was 2.
 

Yesterday's (19 Oct 2016) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 to
0.14 microsievert per hour.  These are within the normal
range of fluctuation of the background radiation level in
Hong Kong (see Note). The average dose rates measured at the
radiation monitoring stations over various parts of the
territory were as follows :

Station                     Yesterday's average
                            (microsievert/hour)
Ping Chau                           0.08
Tap Mun                             0.09
Kat O                               0.09
Yuen Ng Fan                         0.11
Tai Mei Tuk                         0.13
Sha Tau Kok                         0.10
Kwun Tong                           0.12
Sai Wan Ho                          0.09
King's Park                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.13
Chek Lap Kok                        0.13

Note

      

    1. From readings taken at various locations in Hong Kong during
the period 1987-2015, the background ambient gamma radiation
levels may vary between 0.06 and 0.30 microsievert per hour.

    2. The extent of health effects to a person as a result of
exposure to radiation is expressed by a physical quantity
called equivalent dose, in unit of sievert.  Protective
action may be required if there is an increase in the
ambient gamma dose rate above background such that the total
additional dose is expected to exceed 5000 microsieverts in
a relatively short period of time. For example, a dose of
5000 microsieverts may be reached when the ambient gamma
dose rate is 1000 microsieverts per hour (several thousand
times above background) and lasts for 5 hours.

    3. The readings of ambient gamma radiation level from
instrument are expressed in unit of gray, which is
numerically equal to the gamma dose expressed in sievert.
    Climatological Information for 19 Oct
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